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DSP56857 bảng dữ liệu(PDF) 415 Page - Freescale Semiconductor, Inc

tên linh kiện DSP56857
Giải thích chi tiết về linh kiện  Digitial Signal Controller
PDF  662 Pages
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nhà sản xuất  FREESCALE [Freescale Semiconductor, Inc]
Trang chủ  http://www.freescale.com
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DSP56857 bảng dữ liệu(HTML) 415 Page - Freescale Semiconductor, Inc

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Register Descriptions
General Purpose Input/Output (GPIO), Rev. 4
Freescale Semiconductor
15-15
15.8.11 Port C Data Direction Register (GPIOC_DDR)
Figure 15-20. Port C Direction Register (GPIOC_DDR)
See Programmer’s Sheet on Appendix page B - 115
15.8.11.1 Reserved—Bits 15–6
These bits are reserved or not implemented. They are read as 0 and cannot be modified by
writing.
15.8.11.2 Data Direction (DD)—Bits 5–0
These bits control the pins direction when in the GPIO mode. These bits have no effect on the
output enables or pull-up enables in the Normal mode.
•
0 = Pin is an input; pull-ups are dependent on value of PUE registers (default)
•
1 = Pin is an output; pull-ups are disabled
15.8.12 Port D Data Direction Register (GPIOD_DDR)
Figure 15-21. Port D Direction Register (GPIOD_DDR)
See Programmer’s Sheet on Appendix page B - 116
15.8.12.1 Reserved—Bits 15–6
These bits are reserved or not implemented. They are read as 0 and cannot be modified by
writing.
15.8.12.2 Data Direction (DD)—Bits 5–0
These bits control the pins direction when in the GPIO mode. These bits have no effect on the
output enables or pull-up enables in the Normal mode.
•
0 = Pin is an input; pull-ups are dependent on value of PUE registers (default)
•
1 = Pin is an output; pull-ups are disabled
Base + $1
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
0
Read
0
0
0
0
0
0
0
0
0
0
DD
Write
Reset
00
000
00
0
0
0
0
0
0
0
0
0
Base + $1
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
0
Read
0
0
0
0
0
0
0
0
0
0
DD
Write
Reset
00
000
00
0
0
0
0
0
0
0
0
0



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